refactor(setup): remove support for nodecg less than 2.0.0

[Hoishin]

BREAKING CHANGE: Drop support for nodecg 0.x.x and 1.x.x.

[codecov]

Codecov Report

Attention: Patch coverage is 63.33333% with 11 lines in your changes missing coverage. Please review.

Project coverage is 72.17%. Comparing base (e6d8c0c) to head (2bdadd8).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/commands/setup.ts	63.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #124      +/-   ##
==========================================
+ Coverage   70.86%   72.17%   +1.31%     
==========================================
  Files          12       13       +1     
  Lines         786      629     -157     
  Branches      139      125      -14     
==========================================
- Hits          557      454     -103     
+ Misses        225      170      -55     
- Partials        4        5       +1     

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